Gold has surged more than 60% this year and is on track for its best annual performance since 1979. The rally has been underpinned by elevated central-bank buying and a retreat by investors from sovereign bonds and currencies. Bloomberg's Jack Ryan breaks down the situation. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.